Mind map
A mind map is a radial diagram in which a central concept sits at the centre and related ideas branch outward, often with sub-branches representing finer-grained subtopics. Mind maps are used for brainstorming, lecture note-taking, and visual outlining.
Mind maps are best understood as a constrained subset of concept maps: a strict tree, with a single root, ordered branches, and no cross-links. The constraint is what makes them quick to draw and easy to read at a glance.
For research synthesis, the limitation of pure mind maps is that real ideas have many parents. A paper can belong to two literatures; a concept can connect three frameworks. Once cross-links are needed, the right tool is a concept map or knowledge graph rather than a mind map.
AI-generated mind maps are useful as a first draft from a long input (lecture transcript, paper, syllabus) but typically need pruning to be readable. The quality of the prune is what separates good AI mind-map tools from mediocre ones.